X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=src%2Fmain%2Fjava%2Fde%2Ftodesbaum%2Fjsite%2Fmain%2FVersion.java;fp=src%2Fmain%2Fjava%2Fde%2Ftodesbaum%2Fjsite%2Fmain%2FVersion.java;h=373703cb4dadee928a6d4440b352a9ba60f2d18b;hb=38bdc433e50669e8244a63b5af59e597f88f1d29;hp=0000000000000000000000000000000000000000;hpb=f14b9fbe6d88e23920b10a75ebeba4d38390301b;p=jSite.git

diff --git a/src/main/java/de/todesbaum/jsite/main/Version.java b/src/main/java/de/todesbaum/jsite/main/Version.java
new file mode 100644
index 0000000..373703c
--- /dev/null
+++ b/src/main/java/de/todesbaum/jsite/main/Version.java
@@ -0,0 +1,114 @@
+/*
+ * jSite - Version.java - Copyright © 2006–2012 David Roden
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+package de.todesbaum.jsite.main;
+
+/**
+ * Container for version information.
+ *
+ * @author David ‘Bombe’ Roden <bombe@freenetproject.org>
+ */
+public class Version implements Comparable<Version> {
+
+	/** The components of the version information. */
+	private final int[] components;
+
+	/**
+	 * Creates a new version container with the given components.
+	 *
+	 * @param components
+	 *            The version components
+	 */
+	public Version(int... components) {
+		this.components = new int[components.length];
+		System.arraycopy(components, 0, this.components, 0, components.length);
+	}
+
+	/**
+	 * Returns the number of version components.
+	 *
+	 * @return The number of version components
+	 */
+	public int size() {
+		return components.length;
+	}
+
+	/**
+	 * Returns the version component with the given index.
+	 *
+	 * @param index
+	 *            The index of the version component
+	 * @return The version component
+	 */
+	public int getComponent(int index) {
+		return components[index];
+	}
+
+	/**
+	 * Parses a version from the given string.
+	 *
+	 * @param versionString
+	 *            The version string to parse
+	 * @return The parsed version, or <code>null</code> if the string could not
+	 *         be parsed
+	 */
+	public static Version parse(String versionString) {
+		String[] componentStrings = versionString.split("\\.");
+		int[] components = new int[componentStrings.length];
+		int index = -1;
+		for (String componentString : componentStrings) {
+			try {
+				components[++index] = Integer.parseInt(componentString);
+			} catch (NumberFormatException nfe1) {
+				return null;
+			}
+		}
+		return new Version(components);
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	@Override
+	public String toString() {
+		StringBuilder versionString = new StringBuilder();
+		for (int component : components) {
+			if (versionString.length() != 0) {
+				versionString.append('.');
+			}
+			versionString.append(component);
+		}
+		return versionString.toString();
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	@Override
+	public int compareTo(Version version) {
+		int lessComponents = Math.min(components.length, version.components.length);
+		for (int index = 0; index < lessComponents; index++) {
+			if (version.components[index] == components[index]) {
+				continue;
+			}
+			return components[index] - version.components[index];
+		}
+		return components.length - version.components.length;
+	}
+
+}